/*
 * Copyright (c) 2015 Mayur Pawashe
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *
 * Neither the name of the project's author nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#import "ZGMemoryAddressExpressionParsing.h"
#import "NSStringAdditions.h"

ZGMemoryAddress ZGMemoryAddressFromExpression(NSString *expression)
{
	ZGMemoryAddress address;
	if (expression.zgIsHexRepresentation)
	{
		[[NSScanner scannerWithString:expression] scanHexLongLong:&address];
	}
	else
	{
		address = expression.zgUnsignedLongLongValue;
	}
	
	return address;
}

BOOL ZGIsValidNumber(NSString *expression)
{
	BOOL result = YES;
	
	// If it's in hex, then we assume it's valid
	if (![expression zgIsHexRepresentation])
	{
		NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
		// We have to use en_US locale since we don't want commas to be used for decimal points
		// Also DDMathParser won't handle a comma as decimal point for evaluating expressions either due to ambiguity
		[numberFormatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:@"en_US_POSIX"]];
		NSNumber *number = [numberFormatter numberFromString:expression];
		result = (number != nil);
	}
	
	return result;
}
